Pseudo-dynamic test and elasto-plastic seismic response analysis of RC-CFST composite frame model of traditional-style building
Xue Jianyang1 Zhai Lei1 Zhao Xuan1 Li Haibo1 Ge Hongpeng2
1. Xi’an University of Architecture and Technology, Xi’an 710055, China;
2. China Northwestern Architecture Design & Research Institute Co., Ltd., Xi’an 710018, China
Abstract：Pseudo-dynamic tests on a 1/2-scale reinforced concrete (RC)-concrete filled steel tube (CFST) composite frame model of traditional-style building were carried out under the seismic excitation of El Centro wave, Taft wave, Lanzhou wave and Wenchuan wave. The natural frequency and the responses of acceleration, displacement and strain were attained. Failure process, restoring force characteristic curves and deformation capacity were investigated. The results indicate that Rufu beams play the role of first seismic fortification line of model structure. With the increase of input peak ground acceleration, the natural frequency and the acceleration amplification factor decrease gradually. Meanwhile, the pinching phenomenon of hysteretic loops can be observed. The strain analyses indicate that longitudinal bars in corner columns yield before those in side and middle columns. Rufu beams and concrete columns are the main energy dissipation components of the model structure. Based on the experimental study, the elasto-plastic seismic response analysis was conducted by using the SAP2000 software. The elasto-plastic seismic response analysis results agree well with the test ones. The calculated results show that the order of plastic hinges in the model is as follows: firstly Rufu beam ends, then inner columns bottom, side columns bottom, finally inner CFST column bottom and side CFST columns bottom. Under the seismic input of El Centro wave with a peak acceleration of 0.70g, the ultimate elasto-plastic story drift rotation of columns approaches to the limit value specified in the seismic code, indicating that the frame structure has a high seismic safety reservation.
薛建阳 翟 磊 赵 轩 李海博 葛鸿鹏. 传统风格建筑RC-CFST组合框架拟动力#br#
试验及弹塑性地震反应分析[J]. 土木工程学报, 2019, 52(6): 24-34.
Xue Jianyang Zhai Lei Zhao Xuan Li Haibo Ge Hongpeng. Pseudo-dynamic test and elasto-plastic seismic response analysis of RC-CFST composite frame model of traditional-style building. 土木工程学报, 2019, 52(6): 24-34.
